Reversible fulcrum



A. H. PEYCKE. REVERSIBLE FULCRUM..

APPLICATION HLED NOV. I7, I919.

1,418,734. atented une 6, 1922.

ii hi i if;

ARMANI) I-I. PEYCKE, OF CHICAGO, ILLINOIS, ASSIGNOR TO AMERICAN STEEL FOUN DRIES, OF CHICAGO, ILLINOIS, A CORPORATION OF NEW JERSEY.

REVERSIBLE FULCRUM.

snares.

Application filed November 17, 1919.

To all/whom it may concern Be it known that I, ARMANI) H. 'Pnvonn, a citizen of the United States, residingat Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Reversible Fulcrums, of which the following is a specification.

This invention relates to brake beam reversible fulcrums. V

In most reversible fulcrums heretofore produced, the fulcrum posts have been made in three or more parts secured to each other in a given sequence; for example, one part is secured to the compression member of a truss brake beam, another part secured or connected to the tension rod, and the intermediate reversible part or parts secured to the other two parts. It is apparent, therefore, that several separate joints or connections are made which under service conditions become loose or cause a certain amount of lost motion. Such lost motion increases the apparent deflectionv of the beam under braking conditions, and in view of the fact that, according to the requirements, only a relatively small amount of beam deflection is permitted, this point is of considerable importance. Furthermore, when there is lost motion or a certain amount of relative movement between the tension and compression members, the truss formed by such members no longer remains perfect.

Accordingly, one object of my present invention is to provide a brake beam reversible fulcrum which makes possible a perfect truss in the truss type of brake beam and which' will minimize the amount of beam deflection. j

Another object is to provide a reversible fulcrum in which the various parts cooperate in a manner to meet all of the requirements under servlce c-ondltions.

These and other objects are accomplished by means of the arrangement disclosed on: the accompanying sheet-of drawings, n

Specification of Letters Patent.

' rivets 1 5 and 16.

, continuous between the tension I such as by Patented June 6, 1922. Serial No. 338,522.

formed instead of being shown in Figure l; and,

F igure 6 is a diagrammatic plan view of a truss type of brake beam in connection with which my reversible fulcrum finds particular application.

The yarious novel features of the invention will be apparent from the following desorlption and drawings and will be par tlcularly pomted out in the appended claims.

In v ew of the fact that it is necessary to minlmize the beam deflection, I have provided a fulcrum in which the post 10 is contlnuous between the tension member 11 and; compression member 12 of a truss type of brake beam shown diagrammatically in Flgure 6. As shown in Figure 1, the post lncludes two members 13 and 14, which are secured 'to each other adjacent their ends by However, it will be noted post members 13 and 14 is and compression members of the brake beam, so that whatever yield there is to permit relative movement between the tension and compression members must be the result solely of spring or g ve in the metal itself. It will be appreciated that such would be negligible in the type of fulcrum post here shown.

As shown in Figure the rear offset portions of members 13 and 14 are secured to the compression member 12 of the brake beam by means of rivets 16. Of course, it will be appreciated that the fulcrum post may be secured to the compression member in any suitable manner, the well known banded arrange ment. The front end of the post is provided with the usual groove or seat 17 for the tension rod 11. The post near the opposite in two parts, as

that each of these 1 ends thereof is provided with two trunnionreceiving pockets 1S and 19. Mounted between the intermediate spaced portions of the post members 13 and 14 is the reversible member 19 of the fulcrum which has two trunnions 20 and 21 which, respectively, occupy and rotate in the trunnion pocketslS and 19. This reversible member 19 is provided with an elongated slot 22 which extends therethrough for receiving a brake lever 23, the latter being pivotally secured to the reversible member 19 by a pin 24 t, which is mo nt o y Wi hin. th rev sibl 2 of the drawings,

m mb .9 mid d s t xtend ete -he fulcrum post 10. The pin 2 1, in being placed in its operative position, is passed through an opening 25 formed in one side of the fulcrum post 10.

Referring particularly to Figure 3 of the drawings, it will be noted that the brake lever 23 is shown in its two operative positions, one in full lines and the other in dotted lines. In either operative position of the brake lever 23 the pin 2% is automatically prevented from moving into an inoperative position by the side leg portions of the post 10. It is apparent, therefore, that the pin 24: can be applied to the reversible .member 10 or withdrawn therefrom only when the brake lever 23 is in an inoperative or central position, so that the pin opening in the reversible member l9 may register with the opening 25 in the post. Merely as an extra safety factor, a cotter pin 26 is passed through a portion of the reversible member 19 and the pivot pin 24, as particularly shown in Figure 3, it being noted that the ends of the cotter pin are located in recessed portions 27 in the reversible member so that the latter may freely pivot. An opening 28 in the post opposite the opening 25 is provided so that a punch may be inserted therethrough for dislodging the pin 24%.

The reversible member 19 and, accordingly, the brake lever 23 are locked in either one of their operative positions by a key 29, which normally occupies a slot 30 in the fulcrum post, and either one of two slots 81 and 32 formed in the end of one of the trunnions 21. In addition to acting as a lock, the key 29 is wedge-shaped and when driven home forces the lever supporting or reversible member l9 towards the tension rod to firmly seat the lever supporting member 19 that is to say, causing the trunnion 20 to engage the end of the trunnion pocket 18 and the circular shoulder 33 on the member 19 adjacent the trunnion 20 to engage a cooperating shoulder portion 34: formed 011 the inner side of the fulcrum post 10. In this way there can be nolost motion between the lever supporting member 1.9 and the brake tension rod 11, any brake deflection as a result of lost motion of the parts thereby being eliminated; By means of this reversible fulcrum a perfect truss. as shown in Figure 6, is provided, which reduces the beam deflection to a minimum, the only deflection possible being the result of the spring in the material forming the brake beam.

The modfication shown in Figure is eX actly the same as that shown in the other figures of the drawing, with the exception that the post is in a single piece instead of in two pieces, as shown particularly in Figure l. The lever supportin or reversible member 19 as shown in figure 5 is 65 placed within the post during the formation of the latter by means of a method to be more particularly described and claimed in a copending application.

It is my intention to cover all modifications of the invention falling within the spirit and scope of the following claims.

I claim:

1. A brake beam reversible fulcrum including a post continuous between the tension and compression members and having parts thereof spaced to receive and permit a brake lever to move transversely with re spect to said post, a lever-engaging member pivotally mounted within said post whereby the lever may be moved from one position to another transversely of said post without withdrawing the lever from said member, and means for locking said member in a given position.

2. A brake beam reversible fulcrum including a post continuous between the tension and compression members and having parts thereof spaced to receive and permit a brake lever to move transversely with respectto said post, a leverengaging member movably mounted with respect to said post whereby said member may be rotated from one position to another transversely of said post without withdrawing the lever from said member, and means for locking said member in a given position.

3. A brake beam reversible fulcrum including a post continuous between the tension and compression members and having trunnion pockets and an open portion to permit movement of a brake lever, and a leverengaging member having trunnions movably mounted in said post trunnion pockets whereby said member may be rotated from one position to another transversely of said post without changing the position of the lever in said member.

4. A brake beam reversible fulcrum including a post continuous between the tension and compression members and having trunnion pockets a lever-engaging member having trunnions movably mounted in said post trunnion pockets whereby said member may be moved from one position to another, and means at one of said trunnions for looking said member in a given position.

5. A brake beam reversible fulcrum in eluding a post continuous between the tension and compression members a lever-engaging member movable from one operative position to another, and means at one end of said member for locking said member in both of said operative positions.

6. A brake beam reversible fulcrum i11- cluding a post continuous between the tension and compression members and having trunnion receiving pockets, 2. lever-engaging member having trunnions movably mount ed in said pockets whereby said member may be moved from one operative position to another, said post and one of said trunnions having cooperating slots, and a key insertible into SlOts whereby the lever-engaging member may be locked in diflerent positions.

7. A brake beam reversible fulcrum including a post continuous between the tension and compression members, a lever-engaging member movably mounted in said post, and single means for locking said member in a given position in said post and for preventing relative longitudinal movement between said post and member.

8. A brake beam reversible fulcrum i11- cluding a post continuous betweenthe tension and compression members, a reversible member movably mounted in said post, a brake lever, and a pin mounted Wholly Within the confines of the reversible memher forming the pivot connection between said reversible member and lever.

9. A brake beam reversible fulcrum including a post continuous between the tension and compression members, a reversible member movably mounted in said post, a brake lever, and a pin mounted Wholly Within the confines of the reversible member forming the pivot connection between said reversible member and lever, said pin being insertible into its operative position when the brake lever is in an inoperative position and being automatically locked in operative position When said brake lever is in an operative position.

Signed at Chicago, Illinois, this 5th day of November, 1919.

ARMAND H. PEYCKE. 

